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Interesting antique contraption, this Young "Any Angle". Handle has a flat part with three knobs, that falls in the receiving end of the head that has twelve holes. You can so change the angle of the head making it a regular razor or more and more slanted. Kind of a predecessor of the IRO.
The patent drawings show 16 instead of 12 holes in the clamping plate and 2 instead of 3 projections on the handle, but the text refers to both numbers as "a plurality"